On Sun, 30 Aug 2020 13:38:11 +0100, NY wrote:

"fred" wrote in message
...
Why are the Triton 10.8kw models all shown as for mains water only?

Maybe they have a minimum flow rate and/or pressure that a typical tank-fed
cold water system couldn't manage. Why anyone would want tank-fed cold water
bewilders me, since the same feed cannot also feed the bathroom taps where
you might want to drink the water.

Are new houses still built with tank-fed hot or cold water, or is everything
mains-fed these days?

IME with the present shower, the main reason (apart from those above) is to
get sufficient back pressure. A shower will have a switch to cut out if the
BP is too low and an over-temperature cut-out as well.
Mine needs quite a lot of BP, so much that the spray was borderline
dangerouse to any cuts and the eyes. I used a flanged 6mm wall plug in the
input end of the hose, cutting it down gradually to get sufficient flow.
So long as the throughput and temp. rise are OK it doesn't matter where the
constriction is; the challenge is to get a satisfactory spray as most heads
need too much water.
If you use the higher powers these factors aren't so difficult to satisfy.
--
Peter.
The gods will stay away
whilst religions hold sway